Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
tham luc » than luc, tham nuoc, tham thuc
van hanh » ban hanh, van ban, van minh
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
van anh » tuan anh, van minh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. hieu va tham luc ((van hanh) or (((van anh) OR (van thanh)))) vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. hieu va tham luc ((van hanh) OR (((van anh) OR (van thanh)))) vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. hieu va tham luc ((van hanh) or (((van anh) OR (van thanh)))) vi cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu va tham luc ((van hanh) or (((van anh) OR (van thanh)))) vi cua viet*.